Background: Bicuspid aortic valve (BAV) is the most common congenital heart defect and it is responsible for an increased risk of developing aortic valve and ascending aorta complications. In case of mild to moderate BAV disease in patients undergoing supracoronary ascending aorta replacement, it is unclear whether a concomitant aortic valve replacement should be performed. Methods: From June 2002 to January 2020, 75 patients with mild-to-moderate BAV regurgitation (±mild-to-moderate stenosis) who underwent isolated supracoronary ascending aorta replacement were retrospectively analyzed. Clinical and echocardiographic follow-up was 100% complete (mean: 7.4 ± 3.9 years, max: 16.4). Kaplan–Meier estimates were employed to analyze long-term survival. Cumulative incidence function (CIF) for time to reoperation, recurrence of aortic regurgitation (AR) ≥3+ and aortic stenosis (AS) greater than moderate, with death as competing risk, were computed. Results: There was no hospital mortality and no cardiac death occurred. Overall survival at 12 years was 97.4 ± 2.5%, 95% confidence interval (CI: 83.16–99.63). At follow-up there were no cases of aortic root surgery whereas three patients underwent AV replacement. At 12 years the CIF of reoperation was 2.6 ± 2.5%, 95% CI [0.20–11.53]. At follow-up, AR 3+/4+ was present in 1 pt and AS greater than moderate in 3. At 12 years the CIF of AR more than 2+/4+ was 5.1 ± 4.98% and of AS more than moderate 6.9 ± 3.8%. Conclusions: In our study mild to moderate regurgitation of a BAV did not do significantly worse at least up to 10 years after isolated supracoronary ascending aorta replacement.
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